CVE-2025-38490: 
Linux Kernel vulnerability analysis and mitigation

CVE-2025-38490 is a vulnerability discovered in the Linux kernel affecting the libwx network component. The issue was disclosed on July 28, 2025, and involves a duplicate page pool handling that can lead to kernel panic (NVD).

The vulnerability stems from an improper implementation in the pagepoolputfullpage() function within the libwx network component. The function was being called redundantly when it should only be invoked during specific operations - when freeing Rx buffers or building an skb if the size is too short. This duplicate calling leads to a double-free condition of pages, resulting in kernel panic and list corruption (NVD).

When exploited, this vulnerability causes a kernel panic due to double-free page issues, which can lead to system crashes and potential denial of service. The issue manifests through list_del corruption with NULL next pointers and generates kernel warnings (NVD).

The issue has been resolved by removing the redundant pagepoolputfullpage() call, ensuring the function is only invoked during appropriate operations. Fixed versions are available in certain Linux distributions, with Debian bullseye and bookworm already containing the patch (Debian Tracker).